Improvement in carding-mach ines



UNITED STATES PATENT OEETCEO JAMES MCDONALD, OF DETROIT, MICHIGAN.

IMPROVEMENTV IN CARDlNG-'MACHINES.

Speciiication forming part of Letters Patent No. 55,881. dated June 2G, 1866.

To all whom tt may concern Be it known that I, JAMES McDoNALD, of Detroit, in the county of Wayne and State of Michigan, have invented anew and useful Improvement on the Wool Custom Carding or Double Machine.;7 and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making apart of this specication, and letters of reference marked thereon.

The nature of my invention consists in this that narrow bits of wool-cards are placed on each of the spaces oi' the roll-doii'er, hitherto left smooth and unfurnished with either wool cards or teeth of any kind. These bits of wool-card are similar to the ordinary wool-cards of the roll-dofter in all respects save that the teeth should not be quite so long and should be set contrariwise-i. c., pointing in the opposite directionto the, regular card-teeth of the rolldoi'er. These teeth catch any rolls of material that may happen to run over the roller, and

t drawing them into the machine preventthe cards from being flattened by these rolls going between the roller and the roll-dot'l'er. Then, instead of the comb and crank heretofore and now used, a thin shell ot semicircular shape,4 made of iron, tin, zinc, or any other metal which can be ground or made thin, smooth7 and strong, is set, in combination with the roller, so as to take the wool from the rolldoffer and from the roll at once without comb or crank or intermediate roller. This shell must be set close to the under side of the roller and encircling the lower half thereof, but not so close as to rub against it. The back of the shell which is next to the roll-doffer must be set close to the roll-dofter, but not so close as to rnb against it, and a little below or just up to its center.

This change in the construction and adjustment ofthe shell and the insertion oii the teeth in the smooth spaces of the roll-dot'ter, as above described, enable the roller to be brought much nearer the roll-doiter than in the machine as heretofore and at present used, and also dispense with the necessity of using either comb, crank, or intermediate roller.

In using this improvement the pulley by means of which the band of the machine turns the roller should be made a little smaller, or

the pulley by means of which the band ofthe machine turns the roll-dofter a little larger, than in the machine as heretofore used, so as to somewhat increase the speed of the roller over that ot' the roll-doffer.

To enable others to use this improvement, I will proceed to describe its construction and operation.

Iinsert narrow bits of wool'oard (marked a) in each of the smooth spaces of the roll-dottor, (marked A,) not quite so long as the ordinary card-teeth (marked b), oi' the roll-dofter, and set contrariwise-i. e.,pointing in the opposite direction to them-but similar in every other respect. These teeth catch any rolls ot' material that might happen to run over the roller and draw them into the machine, thereby' preventing the cards from being flattened by said rolls going between the roller and the rolldotfer.

Then, instead of the comb and crank hitherto and now used, I set a thin shell (marked (l) of selnicircular shape, made of tin,iron, zinc, or any metal which can be ground or made thin, smooth, and strong,iu combination with the roller (marked B) and encircling the lower half thereof. The back of this shell, which is next the roll-doft'er, must beset close thereto, but not so close as to rub againstit, and a little below or just np to its center.. To both the ends of this side of the shell are fastened pieces of iron bent at right an gles,one end of each of which hangs and works inan iron loop fastened to the inside of each ot' the side beams (marked E) of the frame. Tothe other side of this shell are attached two strings, one at each end of this side of the shell, running to the ends of the side beams of the frame, and there attached to a pin (marked c) set into a hole bored into the end of the frame, and by turning these pins the strings (marked c) are tightened and pull the shell close to, or are loosened and let the shell falli'rom, the roller, as may be desired.

The back of the shell next to the roll-doffer must be ground very thin when carding tine wool, and the roller may be set much closer to theroll-dofter than in the old way of carding with the comb and crank.

The pulley marked Dshouldbe made a little smaller or the pulley marked F a little larger than in the machine as heretofore used, so as to somewhat increase the speed of the roller over that ofthe roll-doffer- I desire hereby expressly to disclaim all right to Letters Patent for the said machine known as the wool custom carding or double machine,77 and any and every part thereof, excepting, however, the privilege of using in connection or combination therewith the improvement hereinbefore particularly described and set forth and hereinafter specifically claimed as my own invention.

What I do expressly claim as my invention, and desire to secure by Letters Patent, is-

l. The use of a thin shell in the place ofthe thick and wooden one heretofore used, which thin shell is set,in combination with the roller, for the purpose of taking the Wool from the droll-doffer at once Without comb, crank, or intermediate roller, said shell being set closer up to the roller than heretofore, and made adjustable near to or far from the roller at will.

2. As a component part of said improvement above described, the insertion of narrow bits of wool-cards (the teeth of which should be a trifle shorter than and Set contrariwise to the ordinary card-teeth of the roll doifer) in the spaces of the roll-doffer heretofore left smooth and unfurnished with cards or teeth, and the change above prescribed in the size of the pulleys, by means of which pulleys the band of the machine turns the roller and rolldotler.

JAMES MCDONALD.

Witnesses:

HENRY M. DUFFIELD,` HUGH GORDON. 

